Closed tran9774 closed 2 years ago
I did something similar with a PS3 controller. The PCA9685 powers up when connected to the ESC when powered on and i can control the throttle and the steering from it. Not sure if this will cause any problems in the long run though.
How did you setup the ESC in that case. Because i don't have a radio transmitter the ESC keeps beeping. I can control the steering with the Adafruit servo kit library in Python though.
I have pretty much the same setup. Here is what I did:
To my understanding (not an electrics guy ...), this way the servos draw power via the ESC from the car battery instead of from the Jetson - on Adafruit there's a warning that excessive current may cause resets and/or damage when an Arduino provides the power, so I figured the same may be the case for the Jetson.
Regarding the ESC, it beeps as long as no control input has been received. I set both steering servo and motor to 0 when launching my script before switching on the ESC.
Feel free to shoot me a mail if some photos would help you with wiring everything up.
Cheers, and have fun with your Jetracer! :)
Hi guys, building a similar configuration too, I've noticed (at least in my setup) that Voltage on PWM cables from ESC are higher than reasonable 5V. I read 5.9V and this is propagated to PCA9685 and Jetson (really an rpi, but it is not rellevant). So I think this could be dangerous.
I'm not using a battery. I'm using an ATX PSU instead, converting from 12V to 7V with DC-DC stepper down. Can you check the theorically 5V ESC line with full battery?
I've created a new issue with more details before you are interested.
Grettings from Spain.
Hi guys.
I'm following this build but I didn't purchase a rc controller because I wanted to use my xbox controller for it. How do you supply power to the PCA9685 to move the Servo?
Greetings from Germany.